In one shallow dish, mix together 1 cup panko bread crumbs, 1 tsp garlic powder, and 1 cup of2 cups finely grated parmesan,. In a separate dish, place the 3/4 cup all-purpose flour. In a third dish, whisk the 2 large eggs with 1 tablespoon of water.
Pat 6 1/4" thick boneless, skinless chicken breasts dry and season it with kosher salt and freshly ground black pepper. First, coat it lightly with flour, ensuring any excess is shaken off. Next, dip it in the egg, and finally, press it gently into the panko mixture to ensure it sticks.
In a small bowl, mix together the 1 cup shredded mozzarella and the remaining 1 cup Parmesan.
Warm up the broiler. On medium heat, use a large, sturdy pot to heat the 1 cup vegetable or canola oil until a deep-fry or instant-read thermometer shows 350°. It's fine if there's slight smoke. Position a wire rack on a baking tray.
Cook the chicken in batches, frying each piece until it turns a golden hue on one side, which should take approximately 1 minute. Turn the chicken over and fry the other side until it's similarly golden. You'll notice the frying sound intensifying slightly, indicating the moisture is evaporating from the chicken; this should take about another minute. Once done, place the chicken on the designated rack. Continue this process with the rest of the chicken pieces. Afterward, drizzle marinara sauce over the chicken and garnish with the cheese blend.
Place under the broiler and monitor closely until the cheese has melted and developed brown patches, approximately 2 minutes.
Serve one chicken breast per plate. Top with chopped fresh basil to garnish. Serve with spaghetti and remaining sauce.